Re: Radioactive gems circulating in Asia?

["Franz Schoenhofer" <schoenho@via.at>]

Schoenhofer
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> 
> And then there were those who, some 3 decades ago, used to massively
> irradiate Brazilian quartz in Co-60 sources to create ersatz cerulean; (
> non-radioactive gems in that case, but fraud nontheless)
> mgoldman@ucdavis.edu
> 
> 
Marvin,

Yes, I remember very well, when I worked in summer 1968 at the Institute
for Radiation Chemistry in Mühlheim/Ruhr, Germany, that I could not conduct
experiments for some time, because the Co-60 source was needed for
irradiation of quartz. Being a student then I did not know much of the
background, only that the quartz was afterwards brown, as was any glass
exposed to high doses.

Franz